Voltammetric determination of N-alkylated anilines by adsorption/extraction at a carbon-paste electrode

✍ Scribed by N.E. Zoulis; C.E. Efstathiou

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 710 KB
• Volume: 204
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86359-x

✦ Synopsis

The voltammetric behaviour of aniline and some of its N-alkylated derivatives at a carbonpaste (Nujol/graphite) electrode is examined. The N-alkylated anilines, in contrast to aniline, are accumulated at the electrode by a combined adsorption/extraction process. The organic bases are determined in the range 10e7-2 x 10m6 M after a 2-min preconcentration period by differential pulse voltammetry; N,N-dimethylaniline can be determined in the presence of excess of aniline (lop5 M) by using medmm-exchange. The voltammetric method is used for evaluation of the distribution ratios of the organic bases in the Nujol/aqueous buffer system. The enhancement of the voltammetric signal of each base is correlated with the respective distribution ratio.